Revert "drm/i915/perf: add a parameter to control the size of OA buffer"
Userspace portion is still missing.
This reverts commit cd956bfcd0.
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181116135510.13807-1-joonas.lahtinen@linux.intel.com
hifive-unleashed-5.1
Joonas Lahtinen
parent
9e180d9991
commit
fe84168647
|
|
@ -2004,7 +2004,6 @@ struct drm_i915_private {
|
|||
u32 last_ctx_id;
|
||||
int format;
|
||||
int format_size;
|
||||
int size_exponent;
|
||||
|
||||
/**
|
||||
* Locks reads and writes to all head/tail state
|
||||
|
|
|
|||
|
|
@ -212,7 +212,13 @@
|
|||
#include "i915_oa_icl.h"
|
||||
#include "intel_lrc_reg.h"
|
||||
|
||||
#define OA_TAKEN(tail, head) (((tail) - (head)) & (dev_priv->perf.oa.oa_buffer.vma->size - 1))
|
||||
/* HW requires this to be a power of two, between 128k and 16M, though driver
|
||||
* is currently generally designed assuming the largest 16M size is used such
|
||||
* that the overflow cases are unlikely in normal operation.
|
||||
*/
|
||||
#define OA_BUFFER_SIZE SZ_16M
|
||||
|
||||
#define OA_TAKEN(tail, head) ((tail - head) & (OA_BUFFER_SIZE - 1))
|
||||
|
||||
/**
|
||||
* DOC: OA Tail Pointer Race
|
||||
|
|
@ -356,7 +362,6 @@ struct perf_open_properties {
|
|||
int oa_format;
|
||||
bool oa_periodic;
|
||||
int oa_period_exponent;
|
||||
u32 oa_buffer_size_exponent;
|
||||
};
|
||||
|
||||
static void free_oa_config(struct drm_i915_private *dev_priv,
|
||||
|
|
@ -519,7 +524,7 @@ static bool oa_buffer_check_unlocked(struct drm_i915_private *dev_priv)
|
|||
* could put the tail out of bounds...
|
||||
*/
|
||||
if (hw_tail >= gtt_offset &&
|
||||
hw_tail < (gtt_offset + dev_priv->perf.oa.oa_buffer.vma->size)) {
|
||||
hw_tail < (gtt_offset + OA_BUFFER_SIZE)) {
|
||||
dev_priv->perf.oa.oa_buffer.tails[!aged_idx].offset =
|
||||
aging_tail = hw_tail;
|
||||
dev_priv->perf.oa.oa_buffer.aging_timestamp = now;
|
||||
|
|
@ -648,7 +653,7 @@ static int gen8_append_oa_reports(struct i915_perf_stream *stream,
|
|||
int report_size = dev_priv->perf.oa.oa_buffer.format_size;
|
||||
u8 *oa_buf_base = dev_priv->perf.oa.oa_buffer.vaddr;
|
||||
u32 gtt_offset = i915_ggtt_offset(dev_priv->perf.oa.oa_buffer.vma);
|
||||
u32 mask = (dev_priv->perf.oa.oa_buffer.vma->size - 1);
|
||||
u32 mask = (OA_BUFFER_SIZE - 1);
|
||||
size_t start_offset = *offset;
|
||||
unsigned long flags;
|
||||
unsigned int aged_tail_idx;
|
||||
|
|
@ -688,8 +693,8 @@ static int gen8_append_oa_reports(struct i915_perf_stream *stream,
|
|||
* only be incremented by multiples of the report size (notably also
|
||||
* all a power of two).
|
||||
*/
|
||||
if (WARN_ONCE(head > dev_priv->perf.oa.oa_buffer.vma->size || head % report_size ||
|
||||
tail > dev_priv->perf.oa.oa_buffer.vma->size || tail % report_size,
|
||||
if (WARN_ONCE(head > OA_BUFFER_SIZE || head % report_size ||
|
||||
tail > OA_BUFFER_SIZE || tail % report_size,
|
||||
"Inconsistent OA buffer pointers: head = %u, tail = %u\n",
|
||||
head, tail))
|
||||
return -EIO;
|
||||
|
|
@ -712,7 +717,7 @@ static int gen8_append_oa_reports(struct i915_perf_stream *stream,
|
|||
* here would imply a driver bug that would result
|
||||
* in an overrun.
|
||||
*/
|
||||
if (WARN_ON((dev_priv->perf.oa.oa_buffer.vma->size - head) < report_size)) {
|
||||
if (WARN_ON((OA_BUFFER_SIZE - head) < report_size)) {
|
||||
DRM_ERROR("Spurious OA head ptr: non-integral report offset\n");
|
||||
break;
|
||||
}
|
||||
|
|
@ -871,6 +876,11 @@ static int gen8_oa_read(struct i915_perf_stream *stream,
|
|||
* automatically triggered reports in this condition and so we
|
||||
* have to assume that old reports are now being trampled
|
||||
* over.
|
||||
*
|
||||
* Considering how we don't currently give userspace control
|
||||
* over the OA buffer size and always configure a large 16MB
|
||||
* buffer, then a buffer overflow does anyway likely indicate
|
||||
* that something has gone quite badly wrong.
|
||||
*/
|
||||
if (oastatus & GEN8_OASTATUS_OABUFFER_OVERFLOW) {
|
||||
ret = append_oa_status(stream, buf, count, offset,
|
||||
|
|
@ -932,7 +942,7 @@ static int gen7_append_oa_reports(struct i915_perf_stream *stream,
|
|||
int report_size = dev_priv->perf.oa.oa_buffer.format_size;
|
||||
u8 *oa_buf_base = dev_priv->perf.oa.oa_buffer.vaddr;
|
||||
u32 gtt_offset = i915_ggtt_offset(dev_priv->perf.oa.oa_buffer.vma);
|
||||
u32 mask = (dev_priv->perf.oa.oa_buffer.vma->size - 1);
|
||||
u32 mask = (OA_BUFFER_SIZE - 1);
|
||||
size_t start_offset = *offset;
|
||||
unsigned long flags;
|
||||
unsigned int aged_tail_idx;
|
||||
|
|
@ -969,8 +979,8 @@ static int gen7_append_oa_reports(struct i915_perf_stream *stream,
|
|||
* only be incremented by multiples of the report size (notably also
|
||||
* all a power of two).
|
||||
*/
|
||||
if (WARN_ONCE(head > dev_priv->perf.oa.oa_buffer.vma->size || head % report_size ||
|
||||
tail > dev_priv->perf.oa.oa_buffer.vma->size || tail % report_size,
|
||||
if (WARN_ONCE(head > OA_BUFFER_SIZE || head % report_size ||
|
||||
tail > OA_BUFFER_SIZE || tail % report_size,
|
||||
"Inconsistent OA buffer pointers: head = %u, tail = %u\n",
|
||||
head, tail))
|
||||
return -EIO;
|
||||
|
|
@ -990,7 +1000,7 @@ static int gen7_append_oa_reports(struct i915_perf_stream *stream,
|
|||
* here would imply a driver bug that would result
|
||||
* in an overrun.
|
||||
*/
|
||||
if (WARN_ON((dev_priv->perf.oa.oa_buffer.vma->size - head) < report_size)) {
|
||||
if (WARN_ON((OA_BUFFER_SIZE - head) < report_size)) {
|
||||
DRM_ERROR("Spurious OA head ptr: non-integral report offset\n");
|
||||
break;
|
||||
}
|
||||
|
|
@ -1385,9 +1395,7 @@ static void gen7_init_oa_buffer(struct drm_i915_private *dev_priv)
|
|||
|
||||
I915_WRITE(GEN7_OABUFFER, gtt_offset);
|
||||
|
||||
I915_WRITE(GEN7_OASTATUS1, gtt_offset |
|
||||
((dev_priv->perf.oa.oa_buffer.size_exponent - 17) <<
|
||||
GEN7_OASTATUS1_BUFFER_SIZE_SHIFT)); /* tail */
|
||||
I915_WRITE(GEN7_OASTATUS1, gtt_offset | OABUFFER_SIZE_16M); /* tail */
|
||||
|
||||
/* Mark that we need updated tail pointers to read from... */
|
||||
dev_priv->perf.oa.oa_buffer.tails[0].offset = INVALID_TAIL_PTR;
|
||||
|
|
@ -1412,8 +1420,7 @@ static void gen7_init_oa_buffer(struct drm_i915_private *dev_priv)
|
|||
* the assumption that new reports are being written to zeroed
|
||||
* memory...
|
||||
*/
|
||||
memset(dev_priv->perf.oa.oa_buffer.vaddr, 0,
|
||||
dev_priv->perf.oa.oa_buffer.vma->size);
|
||||
memset(dev_priv->perf.oa.oa_buffer.vaddr, 0, OA_BUFFER_SIZE);
|
||||
|
||||
/* Maybe make ->pollin per-stream state if we support multiple
|
||||
* concurrent streams in the future.
|
||||
|
|
@ -1443,9 +1450,7 @@ static void gen8_init_oa_buffer(struct drm_i915_private *dev_priv)
|
|||
* bit."
|
||||
*/
|
||||
I915_WRITE(GEN8_OABUFFER, gtt_offset |
|
||||
((dev_priv->perf.oa.oa_buffer.size_exponent - 17) <<
|
||||
GEN8_OABUFFER_BUFFER_SIZE_SHIFT) |
|
||||
GEN8_OABUFFER_MEM_SELECT_GGTT);
|
||||
OABUFFER_SIZE_16M | GEN8_OABUFFER_MEM_SELECT_GGTT);
|
||||
I915_WRITE(GEN8_OATAILPTR, gtt_offset & GEN8_OATAILPTR_MASK);
|
||||
|
||||
/* Mark that we need updated tail pointers to read from... */
|
||||
|
|
@ -1473,8 +1478,7 @@ static void gen8_init_oa_buffer(struct drm_i915_private *dev_priv)
|
|||
* the assumption that new reports are being written to zeroed
|
||||
* memory...
|
||||
*/
|
||||
memset(dev_priv->perf.oa.oa_buffer.vaddr, 0,
|
||||
dev_priv->perf.oa.oa_buffer.vma->size);
|
||||
memset(dev_priv->perf.oa.oa_buffer.vaddr, 0, OA_BUFFER_SIZE);
|
||||
|
||||
/*
|
||||
* Maybe make ->pollin per-stream state if we support multiple
|
||||
|
|
@ -1483,24 +1487,23 @@ static void gen8_init_oa_buffer(struct drm_i915_private *dev_priv)
|
|||
dev_priv->perf.oa.pollin = false;
|
||||
}
|
||||
|
||||
static int alloc_oa_buffer(struct drm_i915_private *dev_priv, int size_exponent)
|
||||
static int alloc_oa_buffer(struct drm_i915_private *dev_priv)
|
||||
{
|
||||
struct drm_i915_gem_object *bo;
|
||||
struct i915_vma *vma;
|
||||
size_t size = 1U << size_exponent;
|
||||
int ret;
|
||||
|
||||
if (WARN_ON(dev_priv->perf.oa.oa_buffer.vma))
|
||||
return -ENODEV;
|
||||
|
||||
if (WARN_ON(size < SZ_128K || size > SZ_16M))
|
||||
return -EINVAL;
|
||||
|
||||
ret = i915_mutex_lock_interruptible(&dev_priv->drm);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
bo = i915_gem_object_create(dev_priv, size);
|
||||
BUILD_BUG_ON_NOT_POWER_OF_2(OA_BUFFER_SIZE);
|
||||
BUILD_BUG_ON(OA_BUFFER_SIZE < SZ_128K || OA_BUFFER_SIZE > SZ_16M);
|
||||
|
||||
bo = i915_gem_object_create(dev_priv, OA_BUFFER_SIZE);
|
||||
if (IS_ERR(bo)) {
|
||||
DRM_ERROR("Failed to allocate OA buffer\n");
|
||||
ret = PTR_ERR(bo);
|
||||
|
|
@ -1518,7 +1521,6 @@ static int alloc_oa_buffer(struct drm_i915_private *dev_priv, int size_exponent)
|
|||
goto err_unref;
|
||||
}
|
||||
dev_priv->perf.oa.oa_buffer.vma = vma;
|
||||
dev_priv->perf.oa.oa_buffer.size_exponent = size_exponent;
|
||||
|
||||
dev_priv->perf.oa.oa_buffer.vaddr =
|
||||
i915_gem_object_pin_map(bo, I915_MAP_WB);
|
||||
|
|
@ -1527,10 +1529,9 @@ static int alloc_oa_buffer(struct drm_i915_private *dev_priv, int size_exponent)
|
|||
goto err_unpin;
|
||||
}
|
||||
|
||||
DRM_DEBUG_DRIVER("OA Buffer initialized, gtt offset = 0x%x, vaddr = %p, size = %llu\n",
|
||||
DRM_DEBUG_DRIVER("OA Buffer initialized, gtt offset = 0x%x, vaddr = %p\n",
|
||||
i915_ggtt_offset(dev_priv->perf.oa.oa_buffer.vma),
|
||||
dev_priv->perf.oa.oa_buffer.vaddr,
|
||||
dev_priv->perf.oa.oa_buffer.vma->size);
|
||||
dev_priv->perf.oa.oa_buffer.vaddr);
|
||||
|
||||
goto unlock;
|
||||
|
||||
|
|
@ -2090,7 +2091,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
|
|||
intel_runtime_pm_get(dev_priv);
|
||||
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
|
||||
|
||||
ret = alloc_oa_buffer(dev_priv, props->oa_buffer_size_exponent);
|
||||
ret = alloc_oa_buffer(dev_priv);
|
||||
if (ret)
|
||||
goto err_oa_buf_alloc;
|
||||
|
||||
|
|
@ -2649,26 +2650,6 @@ static u64 oa_exponent_to_ns(struct drm_i915_private *dev_priv, int exponent)
|
|||
1000ULL * INTEL_INFO(dev_priv)->cs_timestamp_frequency_khz);
|
||||
}
|
||||
|
||||
static int
|
||||
select_oa_buffer_exponent(struct drm_i915_private *i915,
|
||||
u64 requested_size)
|
||||
{
|
||||
int order;
|
||||
|
||||
/*
|
||||
* When no size is specified, use the largest size supported by all
|
||||
* generations.
|
||||
*/
|
||||
if (!requested_size)
|
||||
return order_base_2(SZ_16M);
|
||||
|
||||
order = order_base_2(clamp_t(u64, requested_size, SZ_128K, SZ_16M));
|
||||
if (requested_size != (1UL << order))
|
||||
return -EINVAL;
|
||||
|
||||
return order;
|
||||
}
|
||||
|
||||
/**
|
||||
* read_properties_unlocked - validate + copy userspace stream open properties
|
||||
* @dev_priv: i915 device instance
|
||||
|
|
@ -2796,14 +2777,6 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv,
|
|||
props->oa_periodic = true;
|
||||
props->oa_period_exponent = value;
|
||||
break;
|
||||
case DRM_I915_PERF_PROP_OA_BUFFER_SIZE:
|
||||
ret = select_oa_buffer_exponent(dev_priv, value);
|
||||
if (ret < 0) {
|
||||
DRM_DEBUG("OA buffer size invalid %llu\n", value);
|
||||
return ret;
|
||||
}
|
||||
props->oa_buffer_size_exponent = ret;
|
||||
break;
|
||||
case DRM_I915_PERF_PROP_MAX:
|
||||
MISSING_CASE(id);
|
||||
return -EINVAL;
|
||||
|
|
@ -2812,12 +2785,6 @@ static int read_properties_unlocked(struct drm_i915_private *dev_priv,
|
|||
uprop += 2;
|
||||
}
|
||||
|
||||
/* If no buffer size was requested, select the default one. */
|
||||
if (!props->oa_buffer_size_exponent) {
|
||||
props->oa_buffer_size_exponent =
|
||||
select_oa_buffer_exponent(dev_priv, 0);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -586,14 +586,12 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
|
|||
#define GEN8_OABUFFER_UDW _MMIO(0x23b4)
|
||||
#define GEN8_OABUFFER _MMIO(0x2b14)
|
||||
#define GEN8_OABUFFER_MEM_SELECT_GGTT (1 << 0) /* 0: PPGTT, 1: GGTT */
|
||||
#define GEN8_OABUFFER_BUFFER_SIZE_SHIFT 3
|
||||
|
||||
#define GEN7_OASTATUS1 _MMIO(0x2364)
|
||||
#define GEN7_OASTATUS1_TAIL_MASK 0xffffffc0
|
||||
#define GEN7_OASTATUS1_COUNTER_OVERFLOW (1 << 2)
|
||||
#define GEN7_OASTATUS1_OABUFFER_OVERFLOW (1 << 1)
|
||||
#define GEN7_OASTATUS1_REPORT_LOST (1 << 0)
|
||||
#define GEN7_OASTATUS1_BUFFER_SIZE_SHIFT 3
|
||||
|
||||
#define GEN7_OASTATUS2 _MMIO(0x2368)
|
||||
#define GEN7_OASTATUS2_HEAD_MASK 0xffffffc0
|
||||
|
|
|
|||
|
|
@ -1540,13 +1540,6 @@ enum drm_i915_perf_property_id {
|
|||
*/
|
||||
DRM_I915_PERF_PROP_OA_EXPONENT,
|
||||
|
||||
/**
|
||||
* Specify a global OA buffer size to be allocated in bytes. The size
|
||||
* specified must be supported by HW (currently supported sizes are
|
||||
* powers of 2 ranging from 128Kb to 16Mb).
|
||||
*/
|
||||
DRM_I915_PERF_PROP_OA_BUFFER_SIZE,
|
||||
|
||||
DRM_I915_PERF_PROP_MAX /* non-ABI */
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue